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995 lines
24 KiB
995 lines
24 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* lp5523.c - LP5523, LP55231 LED Driver |
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* |
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* Copyright (C) 2010 Nokia Corporation |
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* Copyright (C) 2012 Texas Instruments |
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* |
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* Contact: Samu Onkalo <[email protected]> |
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* Milo(Woogyom) Kim <[email protected]> |
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*/ |
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|
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#include <linux/delay.h> |
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#include <linux/firmware.h> |
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#include <linux/i2c.h> |
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#include <linux/leds.h> |
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#include <linux/module.h> |
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#include <linux/mutex.h> |
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#include <linux/of.h> |
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#include <linux/platform_data/leds-lp55xx.h> |
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#include <linux/slab.h> |
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#include "leds-lp55xx-common.h" |
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#define LP5523_PROGRAM_LENGTH 32 /* bytes */ |
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/* Memory is used like this: |
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* 0x00 engine 1 program |
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* 0x10 engine 2 program |
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* 0x20 engine 3 program |
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* 0x30 engine 1 muxing info |
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* 0x40 engine 2 muxing info |
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* 0x50 engine 3 muxing info |
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*/ |
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#define LP5523_MAX_LEDS 9 |
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|
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/* Registers */ |
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#define LP5523_REG_ENABLE 0x00 |
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#define LP5523_REG_OP_MODE 0x01 |
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#define LP5523_REG_ENABLE_LEDS_MSB 0x04 |
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#define LP5523_REG_ENABLE_LEDS_LSB 0x05 |
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#define LP5523_REG_LED_CTRL_BASE 0x06 |
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#define LP5523_REG_LED_PWM_BASE 0x16 |
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#define LP5523_REG_LED_CURRENT_BASE 0x26 |
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#define LP5523_REG_CONFIG 0x36 |
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#define LP5523_REG_STATUS 0x3A |
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#define LP5523_REG_RESET 0x3D |
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#define LP5523_REG_LED_TEST_CTRL 0x41 |
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#define LP5523_REG_LED_TEST_ADC 0x42 |
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#define LP5523_REG_MASTER_FADER_BASE 0x48 |
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#define LP5523_REG_CH1_PROG_START 0x4C |
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#define LP5523_REG_CH2_PROG_START 0x4D |
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#define LP5523_REG_CH3_PROG_START 0x4E |
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#define LP5523_REG_PROG_PAGE_SEL 0x4F |
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#define LP5523_REG_PROG_MEM 0x50 |
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|
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/* Bit description in registers */ |
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#define LP5523_ENABLE 0x40 |
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#define LP5523_AUTO_INC 0x40 |
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#define LP5523_PWR_SAVE 0x20 |
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#define LP5523_PWM_PWR_SAVE 0x04 |
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#define LP5523_CP_AUTO 0x18 |
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#define LP5523_AUTO_CLK 0x02 |
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#define LP5523_EN_LEDTEST 0x80 |
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#define LP5523_LEDTEST_DONE 0x80 |
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#define LP5523_RESET 0xFF |
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#define LP5523_ADC_SHORTCIRC_LIM 80 |
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#define LP5523_EXT_CLK_USED 0x08 |
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#define LP5523_ENG_STATUS_MASK 0x07 |
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#define LP5523_FADER_MAPPING_MASK 0xC0 |
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#define LP5523_FADER_MAPPING_SHIFT 6 |
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/* Memory Page Selection */ |
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#define LP5523_PAGE_ENG1 0 |
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#define LP5523_PAGE_ENG2 1 |
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#define LP5523_PAGE_ENG3 2 |
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#define LP5523_PAGE_MUX1 3 |
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#define LP5523_PAGE_MUX2 4 |
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#define LP5523_PAGE_MUX3 5 |
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/* Program Memory Operations */ |
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#define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */ |
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#define LP5523_MODE_ENG2_M 0x0C |
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#define LP5523_MODE_ENG3_M 0x03 |
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#define LP5523_LOAD_ENG1 0x10 |
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#define LP5523_LOAD_ENG2 0x04 |
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#define LP5523_LOAD_ENG3 0x01 |
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#define LP5523_ENG1_IS_LOADING(mode) \ |
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((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1) |
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#define LP5523_ENG2_IS_LOADING(mode) \ |
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((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2) |
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#define LP5523_ENG3_IS_LOADING(mode) \ |
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((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3) |
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#define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */ |
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#define LP5523_EXEC_ENG2_M 0x0C |
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#define LP5523_EXEC_ENG3_M 0x03 |
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#define LP5523_EXEC_M 0x3F |
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#define LP5523_RUN_ENG1 0x20 |
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#define LP5523_RUN_ENG2 0x08 |
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#define LP5523_RUN_ENG3 0x02 |
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#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led))) |
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enum lp5523_chip_id { |
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LP5523, |
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LP55231, |
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}; |
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static int lp5523_init_program_engine(struct lp55xx_chip *chip); |
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static inline void lp5523_wait_opmode_done(void) |
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{ |
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usleep_range(1000, 2000); |
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} |
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static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current) |
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{ |
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led->led_current = led_current; |
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lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr, |
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led_current); |
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} |
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static int lp5523_post_init_device(struct lp55xx_chip *chip) |
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{ |
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int ret; |
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ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE); |
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if (ret) |
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return ret; |
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/* Chip startup time is 500 us, 1 - 2 ms gives some margin */ |
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usleep_range(1000, 2000); |
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ret = lp55xx_write(chip, LP5523_REG_CONFIG, |
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LP5523_AUTO_INC | LP5523_PWR_SAVE | |
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LP5523_CP_AUTO | LP5523_AUTO_CLK | |
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LP5523_PWM_PWR_SAVE); |
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if (ret) |
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return ret; |
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/* turn on all leds */ |
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ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01); |
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if (ret) |
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return ret; |
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ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff); |
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if (ret) |
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return ret; |
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return lp5523_init_program_engine(chip); |
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} |
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static void lp5523_load_engine(struct lp55xx_chip *chip) |
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{ |
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enum lp55xx_engine_index idx = chip->engine_idx; |
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static const u8 mask[] = { |
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[LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, |
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[LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, |
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[LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, |
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}; |
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static const u8 val[] = { |
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[LP55XX_ENGINE_1] = LP5523_LOAD_ENG1, |
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[LP55XX_ENGINE_2] = LP5523_LOAD_ENG2, |
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[LP55XX_ENGINE_3] = LP5523_LOAD_ENG3, |
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}; |
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lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]); |
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lp5523_wait_opmode_done(); |
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} |
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static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip) |
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{ |
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enum lp55xx_engine_index idx = chip->engine_idx; |
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static const u8 page_sel[] = { |
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[LP55XX_ENGINE_1] = LP5523_PAGE_ENG1, |
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[LP55XX_ENGINE_2] = LP5523_PAGE_ENG2, |
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[LP55XX_ENGINE_3] = LP5523_PAGE_ENG3, |
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}; |
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lp5523_load_engine(chip); |
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lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]); |
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} |
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static void lp5523_stop_all_engines(struct lp55xx_chip *chip) |
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{ |
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lp55xx_write(chip, LP5523_REG_OP_MODE, 0); |
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lp5523_wait_opmode_done(); |
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} |
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static void lp5523_stop_engine(struct lp55xx_chip *chip) |
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{ |
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enum lp55xx_engine_index idx = chip->engine_idx; |
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static const u8 mask[] = { |
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[LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, |
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[LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, |
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[LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, |
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}; |
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lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], 0); |
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lp5523_wait_opmode_done(); |
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} |
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static void lp5523_turn_off_channels(struct lp55xx_chip *chip) |
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{ |
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int i; |
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for (i = 0; i < LP5523_MAX_LEDS; i++) |
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lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0); |
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} |
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static void lp5523_run_engine(struct lp55xx_chip *chip, bool start) |
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{ |
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int ret; |
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u8 mode; |
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u8 exec; |
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/* stop engine */ |
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if (!start) { |
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lp5523_stop_engine(chip); |
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lp5523_turn_off_channels(chip); |
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return; |
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} |
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/* |
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* To run the engine, |
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* operation mode and enable register should updated at the same time |
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*/ |
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ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode); |
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if (ret) |
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return; |
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ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec); |
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if (ret) |
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return; |
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/* change operation mode to RUN only when each engine is loading */ |
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if (LP5523_ENG1_IS_LOADING(mode)) { |
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mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1; |
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exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1; |
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} |
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if (LP5523_ENG2_IS_LOADING(mode)) { |
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mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2; |
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exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2; |
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} |
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if (LP5523_ENG3_IS_LOADING(mode)) { |
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mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3; |
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exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3; |
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} |
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lp55xx_write(chip, LP5523_REG_OP_MODE, mode); |
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lp5523_wait_opmode_done(); |
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lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec); |
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} |
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static int lp5523_init_program_engine(struct lp55xx_chip *chip) |
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{ |
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int i; |
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int j; |
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int ret; |
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u8 status; |
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/* one pattern per engine setting LED MUX start and stop addresses */ |
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static const u8 pattern[][LP5523_PROGRAM_LENGTH] = { |
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{ 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0}, |
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{ 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0}, |
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{ 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0}, |
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}; |
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/* hardcode 32 bytes of memory for each engine from program memory */ |
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ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00); |
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if (ret) |
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return ret; |
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ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10); |
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if (ret) |
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return ret; |
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ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20); |
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if (ret) |
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return ret; |
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/* write LED MUX address space for each engine */ |
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for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { |
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chip->engine_idx = i; |
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lp5523_load_engine_and_select_page(chip); |
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for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) { |
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ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j, |
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pattern[i - 1][j]); |
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if (ret) |
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goto out; |
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} |
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} |
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lp5523_run_engine(chip, true); |
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/* Let the programs run for couple of ms and check the engine status */ |
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usleep_range(3000, 6000); |
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ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
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if (ret) |
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goto out; |
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status &= LP5523_ENG_STATUS_MASK; |
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if (status != LP5523_ENG_STATUS_MASK) { |
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dev_err(&chip->cl->dev, |
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"could not configure LED engine, status = 0x%.2x\n", |
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status); |
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ret = -1; |
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} |
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out: |
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lp5523_stop_all_engines(chip); |
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return ret; |
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} |
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static int lp5523_update_program_memory(struct lp55xx_chip *chip, |
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const u8 *data, size_t size) |
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{ |
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u8 pattern[LP5523_PROGRAM_LENGTH] = {0}; |
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unsigned int cmd; |
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char c[3]; |
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int nrchars; |
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int ret; |
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int offset = 0; |
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int i = 0; |
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while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) { |
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/* separate sscanfs because length is working only for %s */ |
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ret = sscanf(data + offset, "%2s%n ", c, &nrchars); |
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if (ret != 1) |
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goto err; |
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ret = sscanf(c, "%2x", &cmd); |
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if (ret != 1) |
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goto err; |
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pattern[i] = (u8)cmd; |
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offset += nrchars; |
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i++; |
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} |
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/* Each instruction is 16bit long. Check that length is even */ |
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if (i % 2) |
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goto err; |
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for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) { |
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ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]); |
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if (ret) |
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return -EINVAL; |
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} |
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return size; |
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err: |
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dev_err(&chip->cl->dev, "wrong pattern format\n"); |
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return -EINVAL; |
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} |
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static void lp5523_firmware_loaded(struct lp55xx_chip *chip) |
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{ |
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const struct firmware *fw = chip->fw; |
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if (fw->size > LP5523_PROGRAM_LENGTH) { |
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dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", |
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fw->size); |
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return; |
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} |
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/* |
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* Program memory sequence |
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* 1) set engine mode to "LOAD" |
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* 2) write firmware data into program memory |
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*/ |
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lp5523_load_engine_and_select_page(chip); |
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lp5523_update_program_memory(chip, fw->data, fw->size); |
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} |
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static ssize_t show_engine_mode(struct device *dev, |
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struct device_attribute *attr, |
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char *buf, int nr) |
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{ |
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struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
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struct lp55xx_chip *chip = led->chip; |
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enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode; |
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switch (mode) { |
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case LP55XX_ENGINE_RUN: |
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return sprintf(buf, "run\n"); |
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case LP55XX_ENGINE_LOAD: |
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return sprintf(buf, "load\n"); |
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case LP55XX_ENGINE_DISABLED: |
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default: |
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return sprintf(buf, "disabled\n"); |
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} |
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} |
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show_mode(1) |
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show_mode(2) |
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show_mode(3) |
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static ssize_t store_engine_mode(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t len, int nr) |
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{ |
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struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
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struct lp55xx_chip *chip = led->chip; |
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struct lp55xx_engine *engine = &chip->engines[nr - 1]; |
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mutex_lock(&chip->lock); |
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chip->engine_idx = nr; |
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if (!strncmp(buf, "run", 3)) { |
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lp5523_run_engine(chip, true); |
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engine->mode = LP55XX_ENGINE_RUN; |
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} else if (!strncmp(buf, "load", 4)) { |
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lp5523_stop_engine(chip); |
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lp5523_load_engine(chip); |
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engine->mode = LP55XX_ENGINE_LOAD; |
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} else if (!strncmp(buf, "disabled", 8)) { |
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lp5523_stop_engine(chip); |
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engine->mode = LP55XX_ENGINE_DISABLED; |
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} |
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mutex_unlock(&chip->lock); |
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return len; |
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} |
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store_mode(1) |
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store_mode(2) |
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store_mode(3) |
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static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len) |
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{ |
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u16 tmp_mux = 0; |
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int i; |
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len = min_t(int, len, LP5523_MAX_LEDS); |
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for (i = 0; i < len; i++) { |
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switch (buf[i]) { |
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case '1': |
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tmp_mux |= (1 << i); |
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break; |
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case '0': |
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break; |
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case '\n': |
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i = len; |
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break; |
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default: |
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return -1; |
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} |
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} |
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*mux = tmp_mux; |
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return 0; |
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} |
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static void lp5523_mux_to_array(u16 led_mux, char *array) |
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{ |
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int i, pos = 0; |
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for (i = 0; i < LP5523_MAX_LEDS; i++) |
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pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i)); |
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array[pos] = '\0'; |
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} |
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static ssize_t show_engine_leds(struct device *dev, |
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struct device_attribute *attr, |
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char *buf, int nr) |
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{ |
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struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
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struct lp55xx_chip *chip = led->chip; |
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char mux[LP5523_MAX_LEDS + 1]; |
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lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux); |
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return sprintf(buf, "%s\n", mux); |
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} |
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show_leds(1) |
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show_leds(2) |
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show_leds(3) |
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static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr) |
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{ |
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struct lp55xx_engine *engine = &chip->engines[nr - 1]; |
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int ret; |
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static const u8 mux_page[] = { |
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[LP55XX_ENGINE_1] = LP5523_PAGE_MUX1, |
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[LP55XX_ENGINE_2] = LP5523_PAGE_MUX2, |
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[LP55XX_ENGINE_3] = LP5523_PAGE_MUX3, |
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}; |
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lp5523_load_engine(chip); |
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ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]); |
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if (ret) |
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return ret; |
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ret = lp55xx_write(chip, LP5523_REG_PROG_MEM, (u8)(mux >> 8)); |
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if (ret) |
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return ret; |
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ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux)); |
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if (ret) |
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return ret; |
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engine->led_mux = mux; |
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return 0; |
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} |
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static ssize_t store_engine_leds(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t len, int nr) |
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{ |
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struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
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struct lp55xx_chip *chip = led->chip; |
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struct lp55xx_engine *engine = &chip->engines[nr - 1]; |
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u16 mux = 0; |
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ssize_t ret; |
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if (lp5523_mux_parse(buf, &mux, len)) |
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return -EINVAL; |
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mutex_lock(&chip->lock); |
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chip->engine_idx = nr; |
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ret = -EINVAL; |
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|
|
if (engine->mode != LP55XX_ENGINE_LOAD) |
|
goto leave; |
|
|
|
if (lp5523_load_mux(chip, mux, nr)) |
|
goto leave; |
|
|
|
ret = len; |
|
leave: |
|
mutex_unlock(&chip->lock); |
|
return ret; |
|
} |
|
store_leds(1) |
|
store_leds(2) |
|
store_leds(3) |
|
|
|
static ssize_t store_engine_load(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t len, int nr) |
|
{ |
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
|
struct lp55xx_chip *chip = led->chip; |
|
int ret; |
|
|
|
mutex_lock(&chip->lock); |
|
|
|
chip->engine_idx = nr; |
|
lp5523_load_engine_and_select_page(chip); |
|
ret = lp5523_update_program_memory(chip, buf, len); |
|
|
|
mutex_unlock(&chip->lock); |
|
|
|
return ret; |
|
} |
|
store_load(1) |
|
store_load(2) |
|
store_load(3) |
|
|
|
static ssize_t lp5523_selftest(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
|
struct lp55xx_chip *chip = led->chip; |
|
struct lp55xx_platform_data *pdata = chip->pdata; |
|
int i, ret, pos = 0; |
|
u8 status, adc, vdd; |
|
|
|
mutex_lock(&chip->lock); |
|
|
|
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
|
if (ret < 0) |
|
goto fail; |
|
|
|
/* Check that ext clock is really in use if requested */ |
|
if (pdata->clock_mode == LP55XX_CLOCK_EXT) { |
|
if ((status & LP5523_EXT_CLK_USED) == 0) |
|
goto fail; |
|
} |
|
|
|
/* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */ |
|
lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16); |
|
usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */ |
|
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
|
if (ret < 0) |
|
goto fail; |
|
|
|
if (!(status & LP5523_LEDTEST_DONE)) |
|
usleep_range(3000, 6000); /* Was not ready. Wait little bit */ |
|
|
|
ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd); |
|
if (ret < 0) |
|
goto fail; |
|
|
|
vdd--; /* There may be some fluctuation in measurement */ |
|
|
|
for (i = 0; i < LP5523_MAX_LEDS; i++) { |
|
/* Skip non-existing channels */ |
|
if (pdata->led_config[i].led_current == 0) |
|
continue; |
|
|
|
/* Set default current */ |
|
lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
|
pdata->led_config[i].led_current); |
|
|
|
lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff); |
|
/* let current stabilize 2 - 4ms before measurements start */ |
|
usleep_range(2000, 4000); |
|
lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, |
|
LP5523_EN_LEDTEST | i); |
|
/* ADC conversion time is 2.7 ms typically */ |
|
usleep_range(3000, 6000); |
|
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
|
if (ret < 0) |
|
goto fail; |
|
|
|
if (!(status & LP5523_LEDTEST_DONE)) |
|
usleep_range(3000, 6000);/* Was not ready. Wait. */ |
|
|
|
ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc); |
|
if (ret < 0) |
|
goto fail; |
|
|
|
if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM) |
|
pos += sprintf(buf + pos, "LED %d FAIL\n", i); |
|
|
|
lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00); |
|
|
|
/* Restore current */ |
|
lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
|
led->led_current); |
|
led++; |
|
} |
|
if (pos == 0) |
|
pos = sprintf(buf, "OK\n"); |
|
goto release_lock; |
|
fail: |
|
pos = sprintf(buf, "FAIL\n"); |
|
|
|
release_lock: |
|
mutex_unlock(&chip->lock); |
|
|
|
return pos; |
|
} |
|
|
|
#define show_fader(nr) \ |
|
static ssize_t show_master_fader##nr(struct device *dev, \ |
|
struct device_attribute *attr, \ |
|
char *buf) \ |
|
{ \ |
|
return show_master_fader(dev, attr, buf, nr); \ |
|
} |
|
|
|
#define store_fader(nr) \ |
|
static ssize_t store_master_fader##nr(struct device *dev, \ |
|
struct device_attribute *attr, \ |
|
const char *buf, size_t len) \ |
|
{ \ |
|
return store_master_fader(dev, attr, buf, len, nr); \ |
|
} |
|
|
|
static ssize_t show_master_fader(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf, int nr) |
|
{ |
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
|
struct lp55xx_chip *chip = led->chip; |
|
int ret; |
|
u8 val; |
|
|
|
mutex_lock(&chip->lock); |
|
ret = lp55xx_read(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, &val); |
|
mutex_unlock(&chip->lock); |
|
|
|
if (ret == 0) |
|
ret = sprintf(buf, "%u\n", val); |
|
|
|
return ret; |
|
} |
|
show_fader(1) |
|
show_fader(2) |
|
show_fader(3) |
|
|
|
static ssize_t store_master_fader(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t len, int nr) |
|
{ |
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
|
struct lp55xx_chip *chip = led->chip; |
|
int ret; |
|
unsigned long val; |
|
|
|
if (kstrtoul(buf, 0, &val)) |
|
return -EINVAL; |
|
|
|
if (val > 0xff) |
|
return -EINVAL; |
|
|
|
mutex_lock(&chip->lock); |
|
ret = lp55xx_write(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, |
|
(u8)val); |
|
mutex_unlock(&chip->lock); |
|
|
|
if (ret == 0) |
|
ret = len; |
|
|
|
return ret; |
|
} |
|
store_fader(1) |
|
store_fader(2) |
|
store_fader(3) |
|
|
|
static ssize_t show_master_fader_leds(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
|
struct lp55xx_chip *chip = led->chip; |
|
int i, ret, pos = 0; |
|
u8 val; |
|
|
|
mutex_lock(&chip->lock); |
|
|
|
for (i = 0; i < LP5523_MAX_LEDS; i++) { |
|
ret = lp55xx_read(chip, LP5523_REG_LED_CTRL_BASE + i, &val); |
|
if (ret) |
|
goto leave; |
|
|
|
val = (val & LP5523_FADER_MAPPING_MASK) |
|
>> LP5523_FADER_MAPPING_SHIFT; |
|
if (val > 3) { |
|
ret = -EINVAL; |
|
goto leave; |
|
} |
|
buf[pos++] = val + '0'; |
|
} |
|
buf[pos++] = '\n'; |
|
ret = pos; |
|
leave: |
|
mutex_unlock(&chip->lock); |
|
return ret; |
|
} |
|
|
|
static ssize_t store_master_fader_leds(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t len) |
|
{ |
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
|
struct lp55xx_chip *chip = led->chip; |
|
int i, n, ret; |
|
u8 val; |
|
|
|
n = min_t(int, len, LP5523_MAX_LEDS); |
|
|
|
mutex_lock(&chip->lock); |
|
|
|
for (i = 0; i < n; i++) { |
|
if (buf[i] >= '0' && buf[i] <= '3') { |
|
val = (buf[i] - '0') << LP5523_FADER_MAPPING_SHIFT; |
|
ret = lp55xx_update_bits(chip, |
|
LP5523_REG_LED_CTRL_BASE + i, |
|
LP5523_FADER_MAPPING_MASK, |
|
val); |
|
if (ret) |
|
goto leave; |
|
} else { |
|
ret = -EINVAL; |
|
goto leave; |
|
} |
|
} |
|
ret = len; |
|
leave: |
|
mutex_unlock(&chip->lock); |
|
return ret; |
|
} |
|
|
|
static int lp5523_multicolor_brightness(struct lp55xx_led *led) |
|
{ |
|
struct lp55xx_chip *chip = led->chip; |
|
int ret; |
|
int i; |
|
|
|
mutex_lock(&chip->lock); |
|
for (i = 0; i < led->mc_cdev.num_colors; i++) { |
|
ret = lp55xx_write(chip, |
|
LP5523_REG_LED_PWM_BASE + |
|
led->mc_cdev.subled_info[i].channel, |
|
led->mc_cdev.subled_info[i].brightness); |
|
if (ret) |
|
break; |
|
} |
|
mutex_unlock(&chip->lock); |
|
return ret; |
|
} |
|
|
|
static int lp5523_led_brightness(struct lp55xx_led *led) |
|
{ |
|
struct lp55xx_chip *chip = led->chip; |
|
int ret; |
|
|
|
mutex_lock(&chip->lock); |
|
ret = lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr, |
|
led->brightness); |
|
mutex_unlock(&chip->lock); |
|
return ret; |
|
} |
|
|
|
static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode); |
|
static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode); |
|
static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode); |
|
static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds); |
|
static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds); |
|
static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds); |
|
static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load); |
|
static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load); |
|
static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load); |
|
static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest); |
|
static LP55XX_DEV_ATTR_RW(master_fader1, show_master_fader1, |
|
store_master_fader1); |
|
static LP55XX_DEV_ATTR_RW(master_fader2, show_master_fader2, |
|
store_master_fader2); |
|
static LP55XX_DEV_ATTR_RW(master_fader3, show_master_fader3, |
|
store_master_fader3); |
|
static LP55XX_DEV_ATTR_RW(master_fader_leds, show_master_fader_leds, |
|
store_master_fader_leds); |
|
|
|
static struct attribute *lp5523_attributes[] = { |
|
&dev_attr_engine1_mode.attr, |
|
&dev_attr_engine2_mode.attr, |
|
&dev_attr_engine3_mode.attr, |
|
&dev_attr_engine1_load.attr, |
|
&dev_attr_engine2_load.attr, |
|
&dev_attr_engine3_load.attr, |
|
&dev_attr_engine1_leds.attr, |
|
&dev_attr_engine2_leds.attr, |
|
&dev_attr_engine3_leds.attr, |
|
&dev_attr_selftest.attr, |
|
&dev_attr_master_fader1.attr, |
|
&dev_attr_master_fader2.attr, |
|
&dev_attr_master_fader3.attr, |
|
&dev_attr_master_fader_leds.attr, |
|
NULL, |
|
}; |
|
|
|
static const struct attribute_group lp5523_group = { |
|
.attrs = lp5523_attributes, |
|
}; |
|
|
|
/* Chip specific configurations */ |
|
static struct lp55xx_device_config lp5523_cfg = { |
|
.reset = { |
|
.addr = LP5523_REG_RESET, |
|
.val = LP5523_RESET, |
|
}, |
|
.enable = { |
|
.addr = LP5523_REG_ENABLE, |
|
.val = LP5523_ENABLE, |
|
}, |
|
.max_channel = LP5523_MAX_LEDS, |
|
.post_init_device = lp5523_post_init_device, |
|
.brightness_fn = lp5523_led_brightness, |
|
.multicolor_brightness_fn = lp5523_multicolor_brightness, |
|
.set_led_current = lp5523_set_led_current, |
|
.firmware_cb = lp5523_firmware_loaded, |
|
.run_engine = lp5523_run_engine, |
|
.dev_attr_group = &lp5523_group, |
|
}; |
|
|
|
static int lp5523_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
int ret; |
|
struct lp55xx_chip *chip; |
|
struct lp55xx_led *led; |
|
struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev); |
|
struct device_node *np = dev_of_node(&client->dev); |
|
|
|
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
|
if (!chip) |
|
return -ENOMEM; |
|
|
|
chip->cfg = &lp5523_cfg; |
|
|
|
if (!pdata) { |
|
if (np) { |
|
pdata = lp55xx_of_populate_pdata(&client->dev, np, |
|
chip); |
|
if (IS_ERR(pdata)) |
|
return PTR_ERR(pdata); |
|
} else { |
|
dev_err(&client->dev, "no platform data\n"); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
led = devm_kcalloc(&client->dev, |
|
pdata->num_channels, sizeof(*led), GFP_KERNEL); |
|
if (!led) |
|
return -ENOMEM; |
|
|
|
chip->cl = client; |
|
chip->pdata = pdata; |
|
|
|
mutex_init(&chip->lock); |
|
|
|
i2c_set_clientdata(client, led); |
|
|
|
ret = lp55xx_init_device(chip); |
|
if (ret) |
|
goto err_init; |
|
|
|
dev_info(&client->dev, "%s Programmable led chip found\n", id->name); |
|
|
|
ret = lp55xx_register_leds(led, chip); |
|
if (ret) |
|
goto err_out; |
|
|
|
ret = lp55xx_register_sysfs(chip); |
|
if (ret) { |
|
dev_err(&client->dev, "registering sysfs failed\n"); |
|
goto err_out; |
|
} |
|
|
|
return 0; |
|
|
|
err_out: |
|
lp55xx_deinit_device(chip); |
|
err_init: |
|
return ret; |
|
} |
|
|
|
static int lp5523_remove(struct i2c_client *client) |
|
{ |
|
struct lp55xx_led *led = i2c_get_clientdata(client); |
|
struct lp55xx_chip *chip = led->chip; |
|
|
|
lp5523_stop_all_engines(chip); |
|
lp55xx_unregister_sysfs(chip); |
|
lp55xx_deinit_device(chip); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct i2c_device_id lp5523_id[] = { |
|
{ "lp5523", LP5523 }, |
|
{ "lp55231", LP55231 }, |
|
{ } |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(i2c, lp5523_id); |
|
|
|
#ifdef CONFIG_OF |
|
static const struct of_device_id of_lp5523_leds_match[] = { |
|
{ .compatible = "national,lp5523", }, |
|
{ .compatible = "ti,lp55231", }, |
|
{}, |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(of, of_lp5523_leds_match); |
|
#endif |
|
|
|
static struct i2c_driver lp5523_driver = { |
|
.driver = { |
|
.name = "lp5523x", |
|
.of_match_table = of_match_ptr(of_lp5523_leds_match), |
|
}, |
|
.probe = lp5523_probe, |
|
.remove = lp5523_remove, |
|
.id_table = lp5523_id, |
|
}; |
|
|
|
module_i2c_driver(lp5523_driver); |
|
|
|
MODULE_AUTHOR("Mathias Nyman <[email protected]>"); |
|
MODULE_AUTHOR("Milo Kim <[email protected]>"); |
|
MODULE_DESCRIPTION("LP5523 LED engine"); |
|
MODULE_LICENSE("GPL");
|
|
|